import json
from country_codes import get_country_code
import pygal_maps_world.maps as pygal
from pygal.style import RotateStyle, LightColorizedStyle

#将数据加载到一个列表中
filename = 'population_data.json'
with open(filename) as f:
	pop_data = json.load(f)

#创建一个包含人口数量的字典
cc_populations = {}
#打印每个国家2010年的人口数量
for pop_dict in pop_data:
	if pop_dict['Year'] == '2010':
		country_name = pop_dict['Country Name']
		population = int(float(pop_dict['Value']))
		code = get_country_code(country_name)
		if code:
			print(code +": "+ str(population))
			cc_populations[code] = population
		else:
			print('ERROR - ' + country_name)
		#print(country_name + ": " + str(population))
#根据人口将所有的国家分成三组
cc_pops_1,cc_pops_2,cc_pops_3 = {}, {}, {}
for cc,pop in cc_populations.items():
	if pop < 10000000:
		cc_pops_1[cc] = pop
	elif pop < 1000000000:
		cc_pops_2[cc] = pop
	else:
		cc_pops_3[cc] = pop
		
#查看每组分别包含多少个国家
print(len(cc_pops_1),len(cc_pops_2),len(cc_pops_3))

wm_style = RotateStyle('#336699',base_style=LightColorizedStyle)
wm = pygal.World(style=wm_style)

wm.title = '世界地图'
#wm.add('2010',cc_populations)
wm.add('0-10m', cc_pops_1)
wm.add('10m-1bn', cc_pops_2)
wm.add('>1bn', cc_pops_3)

wm.render_to_file('world_population.svg')
